i say go with the A series- bore out the a15, stroke it, twin 40's or 45's decent cam and exhaust and you will haul, my A15 has been bored out closer to 1600 twin SU's lumpy cam (mild) and a 4 into 1 exhaust 2" and this thing hauls up hill in 4th. Ive never driven anything like it. I've driven fuel injected civics and #### like that, 1.5, 1.6 even 1.8 and nothing compares!
ty